Teka Loose or Bent Impeller Arm

Disposal makes a rhythmic knocking or thumping sound during operation.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Impeller arm bent by hard object, Impeller pivot worn causing excessive swing, Foreign object repeatedly struck by impeller, Partially detached grinding component

How to Fix / Troubleshooting

Safety first: Turn OFF power and do not continue to run the unit while it is knocking.

  • Step 1 – Inspect impellers: Shine a light into the chamber and observe the impeller arms. They should move freely but not appear bent or cracked.
  • Step 2 – Remove debris: Use pliers to remove any objects that may be struck repeatedly by the impellers.
  • Step 3 – Test briefly: Restore power and run with water for a few seconds. If knocking persists, stop immediately.
  • Step 4 – Replace unit: Bent or loose impellers can detach and cause damage. Replace the disposal.
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Repair Difficulty

Medium 3/5

Required Part

Impeller Assembly
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